What's next in the series (both are related) - A) 31, 28, 31, 30, 31, 30... B) 7, 8, 5, 5, 3, 4, ...

Question

What's next in the following series - A) 3, 3, 5, 4, 4, 3, 5 ..., B) O, T, T, F, F, S, S, ...
(HINT - they are related)

Answer 1

Next element in the series A = 31.
Next element in the series B = 1
In series A, alternate element is 31, as such 31 is chosen after 30. In series B, element corresponding to 31 is reducing by 2. As such 1 is selected.

Answer 2

First series contains the number of days in the months in the order so next months are July and August which has 31 and 31 days. Next series contains the number of letters in those months which is 4 and 6.

A: 31, 28, 31, 30, 31, 30, 31, 31
B: 7, 8, 5, 5, 3, 4, 4, 6